scholarly journals A spheres-in-tube carbonaceous nanostructure for high-capacity and high-rate lithium–sulfur batteries

2018 ◽  
Vol 6 (30) ◽  
pp. 14885-14893 ◽  
Author(s):  
Yuanhang Ge ◽  
Ze Chen ◽  
Sunjie Ye ◽  
Zhifeng Zhu ◽  
Yingfeng Tu ◽  
...  
Keyword(s):  
High Capacity ◽  
Reversible Capacity ◽  
Cycling Stability ◽  
High Rate ◽  
Lithium Sulfur Batteries ◽  
Sulfur Host ◽  
Good Cycling Stability ◽  
Lithium Sulfur

A spheres-in-tube carbonaceous nanostructure has been prepared as an effective sulfur host, exhibiting large reversible capacity and good cycling stability.

N-Doped graphitic ladder-structured carbon nanotubes as a superior sulfur host for lithium–sulfur batteries

2020 ◽  
Vol 7 (20) ◽  
pp. 3969-3979
Author(s):  
Rui Luo ◽  
Baojuan Xi ◽  
Ruchao Wei ◽  
Weihua Chen ◽  
Xiaojian Ma ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Rate Capability ◽  
Cobalt Nanoparticles ◽  
Cycling Stability ◽  
Nitrogen Doped ◽  
Lithium Sulfur Batteries ◽  
Sulfur Host ◽  
Good Cycling Stability ◽  
Lithium Sulfur

Nitrogen doped graphitic ladder-structured carbon nanotubes loaded with cobalt nanoparticles were synthesized and shown to be a suitable sulfur host for lithium–sulfur batteries, which exhibits good cycling stability and excellent rate capability.

scholarly journals Effective ion pathways and 3D conductive carbon networks in bentonite host enable stable and high-rate lithium–sulfur batteries

2021 ◽  
Vol 10 (1) ◽  
pp. 20-33
Author(s):  
Lian Wu ◽  
Yongqiang Dai ◽  
Wei Zeng ◽  
Jintao Huang ◽  
Bing Liao ◽  
...  
Keyword(s):  
Network Architecture ◽  
High Performance ◽  
Lithium Ion ◽  
Reversible Capacity ◽  
High Rate ◽  
Lithium Sulfur Batteries ◽  
Carbon Networks ◽  
Carbon Coated ◽  
Lithium Sulfur ◽  
Initial Capacity

Abstract Fast charge transfer and lithium-ion transport in the electrodes are necessary for high performance Li–S batteries. Herein, a N-doped carbon-coated intercalated-bentonite (Bent@C) with interlamellar ion path and 3D conductive network architecture is designed to improve the performance of Li–S batteries by expediting ion/electron transport in the cathode. The interlamellar ion pathways are constructed through inorganic/organic intercalation of bentonite. The 3D conductive networks consist of N-doped carbon, both in the interlayer and on the surface of the modified bentonite. Benefiting from the unique structure of the Bent@C, the S/Bent@C cathode exhibits a high initial capacity of 1,361 mA h g−1 at 0.2C and achieves a high reversible capacity of 618.1 m Ah g−1 at 2C after 500 cycles with a sulfur loading of 2 mg cm−2. Moreover, with a higher sulfur loading of 3.0 mg cm−2, the cathode still delivers a reversible capacity of 560.2 mA h g−1 at 0.1C after 100 cycles.

Porous TiO2−x with oxygen deficiency as sulfur host for lithium–sulfur batteries

2021 ◽  
pp. 2143004
Author(s):  
Yuman Yang ◽  
Yi Zhang ◽  
Meng Yang ◽  
Xiangyu Zhao
Keyword(s):  
Oxygen Deficiency ◽  
Reversible Capacity ◽  
Polar Compounds ◽  
High Specific Surface Area ◽  
Chemical Adsorption ◽  
Sulfur Species ◽  
Host Materials ◽  
Lithium Sulfur Batteries ◽  
Sulfur Host ◽  
Lithium Sulfur

The dissolution and shuttle behavior of lithium polysulfides has been considered to be one of the serious problems restricting the development of lithium−sulfur (Li–S) batteries. Polar compounds are regarded as promising sulfur host materials due to their strong chemical adsorption to lithium polysulfides. Herein, polar TiO[Formula: see text] with porous structure is employed as the sulfur host, which has a high specific surface area and provides nanoconfined space for storage and adsorption of sulfur species. As a result, the as-prepared S@TiO[Formula: see text] cathode exhibits significantly enhanced reversible capacity, cycling stability, and reaction kinetics compared to those of the as-prepared S@TiO2 cathode.

scholarly journals Sandwiching Sulfur into the Dents Between N, O Co-Doped Graphene Layered Blocks with Strong Physicochemical Confinements for Stable and High-Rate Li–S Batteries

2020 ◽  
Vol 12 (1) ◽  
Author(s):  
Mengjiao Shi ◽  
Su Zhang ◽  
Yuting Jiang ◽  
Zimu Jiang ◽  
Longhai Zhang ◽  
...  
Keyword(s):  
High Performance ◽  
High Capacity ◽  
High Rate ◽  
Graphene Sheets ◽  
Rate Performance ◽  
Shuttle Effect ◽  
Lithium Sulfur Batteries ◽  
Doped Graphene ◽  
Sulfur Host ◽  
Co Doped

AbstractThe development of lithium–sulfur batteries (LSBs) is restricted by their poor cycle stability and rate performance due to the low conductivity of sulfur and severe shuttle effect. Herein, an N, O co-doped graphene layered block (NOGB) with many dents on the graphene sheets is designed as effective sulfur host for high-performance LSBs. The sulfur platelets are physically confined into the dents and closely contacted with the graphene scaffold, ensuring structural stability and high conductivity. The highly doped N and O atoms can prevent the shuttle effect of sulfur species by strong chemical adsorption. Moreover, the micropores on the graphene sheets enable fast Li+ transport through the blocks. As a result, the obtained NOGB/S composite with 76 wt% sulfur content shows a high capacity of 1413 mAh g−1 at 0.1 C, good rate performance of 433 mAh g−1 at 10 C, and remarkable stability with 526 mAh g−1 at after 1000 cycles at 1 C (average decay rate: 0.038% per cycle). Our design provides a comprehensive route for simultaneously improving the conductivity, ion transport kinetics, and preventing the shuttle effect in LSBs.

Frogspawn inspired hollow Fe3C@N–C as an efficient sulfur host for high-rate lithium–sulfur batteries

Nanoscale ◽  
2019 ◽  
Vol 11 (44) ◽  
pp. 21532-21541 ◽  
Author(s):  
Huaiyue Zhang ◽  
Hongtao Cui ◽  
Jing Li ◽  
Yuanyuan Liu ◽  
Yanzhao Yang ◽  
...  
Keyword(s):  
High Rate ◽  
Lithium Sulfur Batteries ◽  
Sulfur Host ◽  
Long Life ◽  
Lithium Sulfur

A hollow Fe3C@N–C with frogspawn-like architecture was successfully constructed as an efficient sulfur host for high-rate and long-life lithium–sulfur batteries.

scholarly journals Three-Dimensionally Ordered Macroporous ZnO Framework as Dual-Functional Sulfur Host for High-Efficiency Lithium–Sulfur Batteries

Nanomaterials ◽  
2020 ◽  
Vol 10 (11) ◽  
pp. 2267
Author(s):  
Haisheng Han ◽  
Tong Wang ◽  
Yongguang Zhang ◽  
Arailym Nurpeissova ◽  
Zhumabay Bakenov
Keyword(s):  
High Efficiency ◽  
High Capacity ◽  
Active Surface ◽  
Active Surface Area ◽  
Shuttle Effect ◽  
Dual Functional ◽  
Lithium Sulfur Batteries ◽  
Sulfur Host ◽  
Ordered Macroporous ◽  
Lithium Sulfur

A three-dimensionally ordered macroporous ZnO (3DOM ZnO) framework was synthesized by a template method to serve as a sulfur host for lithium–sulfur batteries. The unique 3DOM structure along with an increased active surface area promotes faster and better electrolyte penetration accelerating ion/mass transfer. Moreover, ZnO as a polar metal oxide has a strong adsorption capacity for polysulfides, which makes the 3DOM ZnO framework an ideal immobilization agent and catalyst to inhibit the polysulfides shuttle effect and promote the redox reactions kinetics. As a result of the stated advantages, the S/3DOM ZnO composite delivered a high initial capacity of 1110 mAh g−1 and maintained a capacity of 991 mAh g−1 after 100 cycles at 0.2 C as a cathode in a lithium–sulfur battery. Even at a high C-rate of 3 C, the S/3DOM ZnO composite still provided a high capacity of 651 mAh g−1, as well as a high areal capacity (4.47 mAh cm−2) under high loading (5 mg cm−2).

scholarly journals Li2S nanocomposites underlying high-capacity and cycling stability in all-solid-state lithium–sulfur batteries

2015 ◽  
Vol 274 ◽  
pp. 471-476 ◽  
Author(s):  
Motohiro Nagao ◽  
Akitoshi Hayashi ◽  
Masahiro Tatsumisago ◽  
Takahiro Ichinose ◽  
Tomoatsu Ozaki ◽  
...  
Keyword(s):  
Solid State ◽  
High Capacity ◽  
Cycling Stability ◽  
Lithium Sulfur Batteries ◽  
Lithium Sulfur

MnO2 Modified Reduced Graphene Oxide for Lithium–Sulfur Batteries with Improved High-Rate Cycling Stability

2019 ◽  
Vol 11 (8) ◽  
pp. 1093-1099
Author(s):  
Jianghong Wu ◽  
Boyu Liu ◽  
Fujin Shen ◽  
Yang Chen ◽  
Deyi Li ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Cycling Stability ◽  
High Rate ◽  
Reduced Graphene ◽  
Lithium Sulfur Batteries ◽  
Lithium Sulfur
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